以太坊智能合约漏洞安全测试

以太坊智能合约漏洞安全测试

演练平台地址：https://capturetheether.com/challenges/lotteries/guess-the-new-number/

参考文档：https://www.anquanke.com/post/id/154104

 

1 Warmup

  1.1  Deploy a contract

题目要求：

1. Install MetaMask.
2. Switch to the Ropsten test network.
3. Get some Ropsten ether. Clicking the “buy” button in MetaMask will take you to a faucet that gives out free test ether.

 

代码：

pragma solidity ^0.4.21; contract DeployChallenge {

   // This tells the CaptureTheFlag contract that the challenge is complete.

   function isComplete() public pure returns (bool) {

      return true;

   }

}}

  1.2  Call me

代码：

 

  1.3 Choose a nickname

题目要求：

It’s time to set your Capture the Ether nickname! This nickname is how you’ll show up on the leaderboard.

The CaptureTheEther smart contract keeps track of a nickname for every player. To complete this challenge, set your nickname to a non-empty string. The smart contract is running on the Ropsten test network at the address 0x71c46Ed333C35e4E6c62D32dc7C8F00D125b4fee.

代码：

 

 

2 Lotteries

  2.1 Guess the number

  2.2 Guess secret number

  2.3 Guess the random number

  2.4 Guess the new number

 

代码：

 

3 Math

4 Accounts

5 Miscellaneous